A Remote Code Execution issue was identified within the Log4j library that is used by Fabric Gateway to provide logging functionality. Fabric Gateway is used by the IBM MQ blockchain bridge component of IBM MQ 9.1.4 and later to provide connection capability between IBM MQ queue managers and Hyperledger Fabric. The IBM MQ Blockchain Bridge is shipped as part of IBM MQ Advanced on Linux x86-64 only, under the MQSeriesBCBridge RPM package. Based on current knowledge and analysis, no other IBM MQ components or installable packages are affected. This bulletin provides patch information to address the reported Log4j vulnerability (CVE-2021-44228).
DESCRIPTION: Apache Log4j could allow a remote attacker to execute arbitrary code on the system, caused by the failure to protect against attacker controlled LDAP and other JNDI related endpoints by JNDI features. By sending a specially crafted code string, an attacker could exploit this vulnerability to load arbitrary Java code on the server and take complete control of the system. Note: The vulnerability is also called Log4Shell or LogJam.
CVSS Base score: 10
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/214921 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
Affected Products and Versions
|IBM MQ||9.2 CD|
|IBM MQ||9.1 CD|
|IBM MQ||9.2 LTS|
This issue is resolved by APAR IT39386
IBM MQ version 9.2 LTS, 9.1 CD and 9.2 CD
A new patch has been delivered that contains fixes for both CVE-2021-44228 & CVE-2021-45046
Workarounds and Mitigations
The IBM MQ Blockchain Bridge is shipped as part of IBM MQ Advanced on Linux x86-64 only, under the MQSeriesBCBridge RPM package. Based on current knowledge and analysis, no other IBM MQ components or installable packages are affected.
Get Notified about Future Security Bulletins
14 Dec 2021: Initial Publication
16 Dec 2021: Added Statement about other component's applicability to summary.
17 Dec 2021: Updated fix information to detail new patch that resolves both Log4j CVEs
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
17 December 2021